In a letter to the German government in February, Abraham Foxman, director of the US Anti-Defamation League, aired his concerns about all three publications, which have commemorated Adolf Hitler, his deputy Hermann Göring and propagandist Leni Riefenstahl,
He asked why the publishers were not prosecuted under the national law against the propagation of Nazism.
Mr Foxman said: “The Bauer Media Group’s publications may be within the letter of German law, but they may also be seen as legitimising the Nazi regime.”
In response, German government representatives said they would monitor the impact of the publications while also safeguarding freedom of the press and free speech.
But Mr Foxman responded: “Any glorification of the Nazi regime is simply unacceptable. We welcome the commitment of the German government to maintain a vigilant eye on these publications and to take action if they cross the line.”